Winch Electric winch: 220 v power input, the available electric mode; When the battery power supply, if the battery is low or log for a long time, only to power a master control box, the winch to switch to manual mode Master carton tray: stainless steel tray, removable, easy to transport Well under the pulley: well under the pulley with depth counting function, need to master control box use cable connection Pulley support bar: scalable pulley support bar, removable, and winch junction is equipped with hydraulic rod, prevent the support bar shook logging Depth depth counting functions: accurate to 0.05 meters, if appear error, depth can be calibrated Video system: SD card video system, the maximum support 32 gb Depth to zero: zero prior to logging depth, in order to count accurately